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Finding the Fourth Proportional to 6,986.02, 9,640.74 and 4,191.52

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Solution

The fourth proportional to 6,986.02, 9,640.74 and 4,191.52 is: 5,784.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,986.02 : 9,640.74 = 4,191.52 : x
  2. Step 2: Convert to fraction form
    6,986.02/9,640.74 = 4,191.52/x
  3. Step 3: Cross multiply
    6,986.02x = 9,640.74 × 4,191.52
  4. Step 4: Simplify right side
    6,986.02x = 40,409,354.52
  5. Step 5: Solve for x
    x = 40,409,354.52/6,986.02
  6. Step 6: Final answer
    x = 5,784.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.